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Number of 4Xn arrays containing n copies of 0..4-1 with no element plus any horizontal or antidiagonal neighbor equal to 4-1.
1

%I #6 Aug 12 2016 06:53:59

%S 24,248,3344,74416,1738864,50328912,1456019664,45181803312,

%T 1421341476312,46016839245584,1510138127703816,50328278983229392,

%U 1695238381680705040,57677827063819616680,1978346976445491778144,68351672418547405173760

%N Number of 4Xn arrays containing n copies of 0..4-1 with no element plus any horizontal or antidiagonal neighbor equal to 4-1.

%C Row 4 of A265856.

%H R. H. Hardin, <a href="/A265858/b265858.txt">Table of n, a(n) for n = 1..20</a>

%e Some solutions for n=4

%e ..2..3..1..0....2..3..3..1....0..0..1..1....1..1..3..1....1..1..3..3

%e ..2..0..1..0....3..2..0..1....2..3..3..2....0..2..0..2....3..2..3..1

%e ..1..3..1..0....0..1..0..2....2..3..2..3....0..1..3..3....2..2..0..0

%e ..2..3..2..3....3..1..0..2....1..0..1..0....0..2..2..3....2..0..1..0

%Y Cf. A265856.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 16 2015